Broken valve spring!
Thread Starter
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Broken valve spring!
More of my ongoing problems
Does this look a pre existing fault?
Either side of same break shown. Half of spring face is smooth , the other is obviously broken.The break on the other end of spring is rough across both faces.
2nd pic shows what appears to be a shiny wear spot where spring was working on itself before breaking.
Lunati #73943 running at .555 ; spring rated to .630.
Any comments?
Does this look a pre existing fault?
Either side of same break shown. Half of spring face is smooth , the other is obviously broken.The break on the other end of spring is rough across both faces.
2nd pic shows what appears to be a shiny wear spot where spring was working on itself before breaking.
Lunati #73943 running at .555 ; spring rated to .630.
Any comments?
Thread Starter
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
The keepers jammed in the retainer holding everything up.Didn't notice at first when I pulled the covers because rocker appeared to be working fine and the spring was compressing.Just wasn't coming back up onto the seat .Was running open headers so didn't noticing the chuffing from that cylinder
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Since one broke, look at the others for witness marks for the cause. If the spring(s) went into coil bind you should see shiny areas, perhaps on the unbroken springs where two coils touch and rub against each other.
If no sign of contact I'd suspect the spring material. Bad batch?
Moroso, and probably others, sell a seat pressure tester that you can use to see if the other springs have become weak from either being over-worked or from a bad batch. If seat pressure has dropped by more than 10% I'd change all of them.
Jake
West Point ROCKS!
If no sign of contact I'd suspect the spring material. Bad batch?
Moroso, and probably others, sell a seat pressure tester that you can use to see if the other springs have become weak from either being over-worked or from a bad batch. If seat pressure has dropped by more than 10% I'd change all of them.
Jake
West Point ROCKS!
Thread Starter
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Compressed there is a visible ( yet to measure ) gap between all the coils.
Have bought Neat's TFS 195 LE ported heads that have Pac beehive springs so shouldn't have any future problems
